Patient Zeng x, female, 37 years old, had been experiencing unclear and blocked hearing in her left ear, which was especially noticeable when listening to the telephone for more than 2 months, with no complaints of other discomfort. She had been seen in several hospitals for several times, but did not pay attention to it because the hearing test was normal, but it never improved. Later, he came to our hospital for consultation. Hearing examination was normal. However, further examination of the auditory brainstem response (ABR) was abnormal, and the possibility of brain tumor was considered. The patient was advised to undergo magnetic resonance imaging (MRI), which revealed a mass of approximately 4.0×2.0 cm in size in the left pontocerebellar horn region, connected to the dura mater by a wide base, with heterogeneous signal, isosignal on T1WI and slightly high signal on T2WI. The mass pushed out the left auditory nerve. The diagnosis was meningioma. He was later hospitalized in our neurosurgery department for surgical treatment, which was relatively smooth. Therefore, if you have unilateral tinnitus and cannot hear things clearly, it is important to consult a doctor in time to exclude the possibility of auditory nerve or brain tumor to achieve early diagnosis and early treatment.